Lysine, gut microbes and phages in young versus senescent digestive cells
In an experimental cellular model, the abstract reports that effects of excess lysine may depend on gut bacteria, intestinal phages and whether host digestive cells were young or senescent. These are model findings, not established human benefits. [1]
Automatic summary · not editorially reviewed
The key findings
The abstract states that lysine intake as nutraceuticals or dietary supplements has risen, particularly among older adults, and that the host-microbe-phage-nutrition interplay is not yet fully studied. [1]
The researchers combined young and senescent digestive cell models with P. aeruginosa PAO1, phage KPP22 and Intestinimonas butyriciproducens in a five-way screening approach. [1]
The abstract reports that lysine supplementation effects, beneficial or detrimental, may depend on the bacterial community, intestinal phages and host and microbial metabolic conditions. [1]
The source at a glance
- Study type / format
- Experimental cellular model (abstract)
- Population / context
- Cultured young and senescent digestive cells with gut bacteria and a phage in an experimental model
- Summary based on
- Study abstract
- Original publication
- September 26, 2026
Lysine use in older adults and open questions
The abstract notes rising consumption of lysine in nutraceutical and dietary supplement form, particularly among older adults, because the body cannot make it. It lists roles in intestinal calcium and iron absorption, protein production and fatty acid metabolism. It states that the biochemical and immunological events of the host-microbe-phage-nutrition interplay, and effects on gut bacteria-derived metabolites, are not yet fully studied. The authors framed two hypotheses: that excess extracellular lysine is metabolized differently by young versus senescent digestive cells in an inflamed, infected setting, and that phages show altered host-microbe cometabolite signal profiles.
Supporting source [1]
Five-way cell screening with bacteria and a phage
The researchers combined two models of young and senescent digestive cells with the pathogenic bacterium P. aeruginosa PAO1, the Pseudomonas phage KPP22 and the anti-inflammatory bacterium Intestinimonas butyriciproducens. They simulated the interactive process of excessive lysine ingestion and built a five-way screening approach. Readouts included viability, integrity and function of the epithelial barrier, plus cellular immunometabolic responses to added lysine in cultures under infectious inflammation.
Supporting source [1]
Possible dependence on bacterial community and host state
The findings are described as consistent with the possibility that host-microbe-microbe interactions involving lysine use and cross-feeding may influence the effects of lysine supplementation. Whether effects are beneficial or detrimental could depend on the bacterial community, including pathogenic or potentially beneficial bacteria, interactions with intestinal phages, and the physiological conditions and metabolic requirements of the host and individual microbial groups. The abstract does not report specific numerical results or confirm effects in people.
Supporting source [1]
How to interpret this
This is an abstract only; the full text was not reviewed. It describes an experimental cellular model with cultured cells, bacteria and a phage, not a human study. No numerical results, sample sizes or follow-up are reported, and human health benefits are not established.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Ghadimi D, Blömer S, Kaya AŞ, Krüger S, Röcken C, Schäfer H, de Heer G, Jarczak D, Uchiyama J, Matsuzaki S, Bockelmann W. · europepmc.org · September 26, 2026